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	<title>Document</title>
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	.father{
		width: 500px;
		height: 500px;
		background: #eee;
		margin: 100px 0 0 300px;
		position: relative;
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		.red{
			width:100px;
			height: 100px;
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		.red{
			background: red;
			position: absolute;
			top: 20px;
			
			
		}
		span{
			position: relative;
			width:100px;
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			background:red;
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<body>
	
	<span>14期威武</span>
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